I’ve spend all day today working on this out-of-sync audio issue I have with my video conversion process. I explained the issue in my previous posting, which I find strange since I was very careful to not install any codec packs. After my fresh install of the Windows 7 OS, I installed DVRMSToolBox along with Windows Media Encoder 9 and its SDK. It might be that WME9 could have installed some DirectShow Filter or codec that is causing this problem.
So, I ran several tests today converting my 1-hour WTV file (Stargate Atlantis TV Show) with different settings. Ultimately, here was my final solution:
- Installed the freeware called InstalledCodec which I used to display all the audio and video codecs as well as DirectShow filters installed on my Windows 7 machine.
- Using InstalledCodec, I sorted the list of items by installed date, and then disabled all of them from working. Since I very recently install the Win 7 OS on my system, it was easy for me to identify the new codecs and filters that were installed after the OS by date.
- I then ran my various conversion tests, using many different methods.
Now, under these conditions I should have only the basic codecs, splitters, encoders, filters, etc. working on my system. Essentially, everything that was supplied by Windows 7 (and any downloaded updates). So after running my various tests, I still was unable to rectify the out-of-sync audio situation for my test file. So I began to think that maybe the test file was messed up when it was recorded (even though my TV Tuner card has it’s own built-in MPEG encoder) with a previous installed codec, splitter, etc.
Thus, I manually recorded a 30-minute news broadcast to a WTV file, and use that file for a 2nd test. After the conversion process, I examined the generated WMV file on my Zune HD, and low-and-behold the audio appeared to be in complete sync with the video from start to finish! So, maybe it was something on my system before the “big purge” that was causing the WTV file to be messed up. But that is really strange, since the converted video files on my PC played back fine.
I can’t explain it… I’ll just hope that by removing all those 3rd-party Codecs and filters that my system can convert videos once again without making the final product appear to be like an old English-dubbed Bruce Lee movie! 🙂
If I continue to have problems in the future, I’ll need to keep disabling any MPEG and audio -related items shown in InstalledCodec until I find the one that is causing the problem. It actually might be a Windows 7 installed item, which I might need to replace with a 3rd-party codec. Time will tell…